Honing machine



Allg. 27; 1946. E F vMOQN f 2,406,556

' HONING MACHINE Y Filed Sept; 16,l 1945 2 Sheets-Sheet ll Aug. 27, 1946.

l E. F. MOON HONING MACHINE Filed spt. 1e, 1945 wpa/07 2 Sheets-Sheet 2 Patented Aug. 27, 1946 HCNING MACHINE Ernest F. Moon, Denver, Colo., assigner to Remingtonv Arms Company, Inc. Bridgeport, Conn., a corporation of Delaware Application September 16, 1943, SerialNo. 502,565

7 Claims. (Cl. 51e-170.).-

The present invention relates to an improvement in honing machines, particularly for the finishing or polishing of tools, dies, and the like, which require a highly polishedv precision surface. Anobject ofA the invention is `to provide a tool of this character for both external and internal finishing operations, adapted to be conveniently hand operated, so asto permit of the effective controlled iinishing of the work Within extremely close tolerance limits, and by means of which the finishing operation may be carried out with better polishing results and in. substantially less 'time than has heretofore been required with the use of builing wheels and compounds.`

lA' further object is to 'provide a honing machine adapted for'convenient assembly with a hand-held power unit, in the form of an electric motor having a drive shaft `projecting from a handle extension vof the motor housing'.`

Another object isto provide a honing'ma-V chine including one or more reciprocating honingstone elements, arranged for engagement with the work piece, and' wherein yielding means is provided for engagingv the stones with the work piece, to the end that the hand-held-machine may be manipulated with a highly controlled degree of engaging pressure on the work piece.

-With the above and other objects in view, embodiments of the invention are shown in the accompanying drawings, and these embodiments will. be hereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the drawings- Fig. 1' is a side elevation of a honing machine illustrating one formV of the invention.

Fig. 2 is a longitudinal vertical lsectionalview c thereof.

Fig. 3 is a transverse vertical sectional View, taken along the line 3`3 ofY Fig. Y2.

Fig. 4 is a transverse vertical sectional View taken alongthe line`4-41lof Fig; 2. i

Fig. 51 is a View partially insection and partially inside elevation, showing the tool illustrated in Figs. l to 4 engaged with the workpiece.

Fig. 6 is a plan View of the inner sideof one of the honing stone carrying sleeve members and the honing stone element carried thereby.

Fig. 7 is a plan viewof a modied form of the invention.

Fig. 8 is a longitudinal vertical sectional View thereof, partially in side elevation, taken along the line 8-8 of Fig. 7.

lfg. 9 is al transverse vertical sectional- View,

stone elements being removed.

Fig.10 is al transverse vertical sectional. View..

' taken along the line IIJ-l0 of Fig. 8.

Fig..11.is a perspective View of the. upper and:` e: lowerV stone carrying sleeve members inverti-y callyl separated relation.

Similar reference characters indicate correspending parts throughout the several figuresv of the drawings.

In'Figs. 1 to 6 there is. illustrated a honin machine constructed in accordance. with the'. in.- vention, whereink a pair of oppositely reciprocating stone members are associatedv in. the mach-ine-l` The main supporting and driving parts are the motor of the conventional type. of hand tool, not

shown, thev extension arm- Il of itshousing, and the box cam i4 carried by the motor: shaft I3.y

The main supporting4 sleeveY 35. is secured to the cylindrical end I2'A- of .the extension. Il by means. of a set screw 316, and is provided with a longitudinal'. guide slot. 31 in its upper side.; In the. diametric lateral plane of the projectingV end portion of the sleeve 35 there are provided a pair Vof opposed longitudinal. slots 38--38', in which.

are engaged key strips. 39-39 extending into en.- gagement. with the cylindrical surface of the box;

cam I4.` l

A pair of spaced cylindrical surfaced stone:

carrying sleeve membere 4' and 4l are slidably l engaged within theV mainv supporti-ng sleeve in surrounding. relation to the. cam and respectively above and below the key strips 39, the upper sleeve member 4i] being provided with anV inwardly projecting pin 42 engaging thecam track i6, and the lower sleeve member 4|' being vprovided wth aninwardly projecting pin 43 engaging the cam track in diametrically opposed relation tothe pin 42. Rotationl of the cam imparts oppositev reciprocatory'movement to the sleeve members;

To each of the sleeve members Athere is secured a honing stone. 44?, the connection means for which consists of an armk member 45 formed of springmetal and secured i-n a recess 46 in the at'. inner face of the forward end wall-lof theA sleeve member by means of a screw 41, the pro'- jecting portion of' the arm'being provided with apair of' bayonet slots 48 in which are engaged bayonet hook portions 49- of a spring clip -member 50 in which the inner end ofthe honing stone is engaged and secured. The outer surfacesof the honi-ng stones are preferably cylindrical and of rounded tapered form at their outer ends.

A safety cover sleeve 5I is slidably engaged about the main supporting vsleeve 35, and is provided at its outer end with a flat forward wall 52 lhaving a central aperture 53 therein through which the stones are adapted to be projected. AA knob 54 is screwed into the cover sleeve and is i provided with a screw portion 55 projecting inf wardly into engagement with the slot 31 of the 3 main supporting sleeve, the length 0f the slot determining the projected and retracted positions Within the safety sleeve,l i between its forward wall and the outer end of the' main supporting sleeve 35, there is provided a relatively light helical springv 56 which normally,VV projects the cover member. l the end of the safety sleeve against the face of the work projects the honing stones through the 1 aperture 53 into engagement with the work, as M shown in Fig. 5, the safety sleeve in this case if 1 serving to steady the position of the honing ma- 1 chinerwith-respect tothe work. Thesafety sleeve may also be retracted by means of the knob, the l pressure of the spring beingsufciently light Aso that it maybe held in retracted position during. l thehoning operationby a finger of the hand supi porting vthe machine., Inz operation the honingV l stones are reciprocated rapidly in opposite directions, .thespringiness ofthe supporting arms 45 i allowing them to yieldslightly as they engage the work.

of theV safety sleeve.

Thus pressure upon In Figs. v to 11 there isiuustrateda mdmed form vvof the invention,pwherein the honing stones. i

are; arranged for reciprocation at right angles to Y theaXis. of the motor shaft, this embodiment being. particularlyadapted for external honing, asY forY Ainstance polishing Aof4 the Vcylindrical outer surface cfa punch. A two part main supporting 1 upon the. motor eXtension I I, the lower substani tially Vsemicylindrical sleeve `part 5'I being engagedabout the lower half of the motor housing' extension il i with vthe cylindrical fforward end. portionrv I2Y thereof fitting the inner 'cylindrical surface of the Vlower sleeve part, which is secured lto .the extension by means of .a Vsemi-circular1r f clampES encircling the upper half of the portion 1 I2 .andfsecured atiits outwardly projectingange 1 portions 59 by screws 6i) to ledge Aformations, i 6in1-5I provided upon Vopposite sides of the lower j sleeve; part.; At its inner end the lower sleeve partA y is provided with aV cylindrical band portion 52 for encircling engagement about the tapered surl faceof theextension I I in proximity to themotor 1 housing, l'

The upper substantially semi-cylindrical sleeve partencloses. the upper side vof the extension. Q IIrin opposed relationr to the lower sleeve', part, t and Vis hingedly connected to thelatter by means' ofhinge pins 64 having bearing in upwardlyfprof, Vjectinghinge supporting plates 65,-55 welded or i otherwise suitably secured at opposite sides to the i lower. sleeve part, V,Arsemi-cylindrical' recess, 66 is previded in` the inner, surface of4 the upper 1 sleeve partwithin whichthe clamp 58 isreceived., Y, The upper Land lower; sleeve partsV projectlforwardly a` substantial distance Yfrom the endrporf,l

mation, this slideway formation of the upper sleeve part consisting of an upper flat horizontal wall portion 1I, and retaining slideway guide channels 12 and 13, the channel 12 being formed in the forward wall 6T and the channel 'I3 being formed in a forward inwardly extending flange portion lli of the upper wall portion 'II. The slideway of the lower sleeve partis of similar form, and comprises a lower flat horizontal wallr .portion 15, a slideway guide channel 16 formed in the forward wall 68 of the lower sleeve part and 'a slideway guide channel I'I formed in the inwardly extending forward flange portion 'I8 of The uppei` stone carrying member is in the `form of a boX-likevsleeve of generally rectangular form, and comprises an upper rectangular plate portion I slideably engaged at its longitudinal edges for transverse reciprocatory sliding movement in the guidechannels 12 and 73, and having by means of setscrews 85'inthe forward wall 83.

The Astone is provided with a suitablerwork en-y gaging surface, consisting in the Villustrated'ern-H; bodiment of a central V-groove 86 extending part allel to the direction of-reprocation of the stoner,

' The sleevefor carrying thelower honing stone`4 ,comprisesv a rectangular bottom plate portion 87,' engaged at `its longitudinal `edges with the slidei j way guide channelII and-,'11, and having kin its ,i

undersurface a relief, recess l88;V {In forwardlyV spaced relation Ato its rearward edge thebottom plate portion 81 is provided with anupstanding vertical wall 89, recessed at ,its forward side as at 9!)r to provide awrelativelyrthick lower,por.tionthe Y inwardly VVdisposed Y shoulderv ledge. of. fwhich is vertically opposedto Vthe wa11l8I of the upper` sleeve, and a relativelyrvthinner upperwall-portion 2 inwardly offset from the wall 8|v of the upper Ysleeveand overlapping-Vit.Y lThisrelatively thintion-Iz-oftheV motor housing extension II, and y .The honing stones are respectively'carried upon i thel forward ends of the upper and lower supprtingsIeeve'parta--and for this purpose each sleeve part i'sprovidedwith Va transverse, slideway'fory nereupper -wallpgrtion is provided centrally with# a vertical cam receiving slot ill.K In rearwardly spacedprelation to its forward` edge the bottom plate portion 81 ishprovided with an upstanding `vertical wall 92, the lower, honing stone393 being engaged between this wall and the relatively thick lower part of ,the wall 89 andsecuredtherein by set screws 94'in'theforward wall/,92. Y The lower honing stone 973 is ofA identical forni with'theupper stone, and is provided centrally with'a Y V-grooveV 951 opposed `to thevi-groove 86 ofthe upper stone. Inorder tobalance the-weight'o'f `the lower sleevewiththe upper sleeve, the lower sleeve is providedvwithjza rectangular opening 96 in its lower plateportion A8l anda series of cylinofthewalli.Y Y Y, Y, Y

Upon the forward -screwthreaded end ofzthe motor shaft I3 there is engaged anvinternally threaded cam arbor 98,- xed in position by means .of a lock nut 99 and extending'at'its-forward reduced diameter portion |00 through the passage provided by the Vrecesses 59 Yand 'I0 ofY the e projecting end portionl I 40 I` with eccentrically mounted Ycircularv cams |82 and ID3 positioned in spaced relation by a spacing washer |04, these cams being set so that they are eccentricv in diametrioally opposite directions. The cam |02 is engaged in the slot 82 of the upper stone carrying sleeve member and the .cam |03is engaged in the slot 9| of the lower stone carrying sleeve member, the cam diameters corresponding to the widths of the slots. 'Thus rotation of the motor shaft causes the cams to impart rapid reciprocatory movement to the stone carrying sleeves in opposite directions.

In operation the honing stones have theV work piece engaged between them in the V-grooves 86 and 95, the work piece being preferably rotated slowly during the honing operation. For the purpose of engaging the work piece between the stones, as well as to accommodate work pieces of different diameters and to apply compressive pressure of the stones upon the work piece, the upper supporting sleeve part is adapted to have swinging movement with respect to the lower sleeve part about the hinge support 64, without disturbing the cooperative engagement of the cam |02 in the slot 82, so that the reciprocating actuation of the stones takes place in any position of the relative swinging adjustment between the two stones.

Yielding pressure is applied between the upper and lower supporting sleeve parts, and for this purpose a tension clamp is provided comprising a yoke |65 secured at its side arms by means of screws |06 in hat-surfacedl recesses IBL-|37 provided in the opposite sides of the lower sleeve part contiguous to its forward end, this yoke member being disposed in arched spaced relation to the upper sleeve part. An internally threaded tubular spring supporting bushing |98 is screwed in a threaded hole |09 provided centrally in the yoke, and is provided with an adjustable pressure screw Il, a helical tension spring being engaged at its upper end within the lower portion of the passage through the bushing |88 and at its lower end in a circular pocket ||2 provided in the upper side of the upper sleeve part 63. This spring presses the upper honing stone 84 toward the lower honing stone 93, and permits opening of the stones to engage the work between them and to accommodate work of different diameters. By adjusting the screw the tension of the spring may be regulated to apply greater or less compressive pressure of the stones upon the work being polished.

The form of the invention illustrated in the drawings and described herein is typical and illustrative only and it is evident that the invention is capable of embodiments in other forms, all falling within the scope of the appended claims, which are to be broadly construed.

What is claimed is:

1. In a finishing tool, a drive unit including a housing and a rotatable drive shaft mounted therein, cam means on said drive shaft, a supporting sleeve engaged about said housing and including a portion from said housing in surrounding relation to said cam means and constituting slideway guidemeans arranged parallel to the axis ofV said drive shaft, va tool carrier mounted for reciprocation in said guide means, cam engaging means carried by said tool carrier and engaged with saidv cam means, whereby rotation of said cam means imparts reciprocation to said tool carrier, a tool carried by said tool carrier projecting forwardly therefrom, and a spring projected tubular protective cover member slid- 6 f ably engaged with said supporting sleeve. and' having an apertured forward endv through which. said tool is adapted to be projected through 'ree traction of said cover member. i

2. In a iinishing tool, a drive unit including a. housing and a rotatable drive shaft` mounted therein, cam means on saidv drive shaft,..a sup.. porting member engaged. with said housing,- slideway guide means carried by said. supporting memberand arranged' parallel to. the axis of, said drive shaft, a pair ofzoppositelyarranged tool carriers mounted for reciprocation in said guide means, and cam engaging means respectively carried by said tool carriers and engaged with said cam means, whereby rotation of said cam means imparts simultaneous reciprocation to said tool carriers in opposite directions.

3. In a nishing tool, a drive unit including a housing and a rotatable drive shaftmounted therein, cam means on said drive shaft, a supporting sleeverengaged about said housing and including a portion projecting from said housing in surrounding relation to said cam means and constituting slideway guide means arranged parallel to the axis of said drive shaft, a pair of oppositely arranged substantially semi-cylindrical tool carriers mounted for reciprocation in said guide means, and cam engaging means respectively carried by said tool carriers and engaged with said cam means, whereby rotation of said cam means imparts simultaneous reciprocation to said tool carriers in opposite directions.

d. In a iinishing tooLadrive unit including a housing and a rotatable drive shaft mounted therein, cam means on said drive shaft, a supporting member engaged with said housing, slideway guide means carried by said supporting*` member and arrangedparallel to the axis of said drive shaft, a, pair of oppositely arranged tool carriers mounted for reciprocation in saidguide means, springy tool mount members respectively carried by said tool carriers yieldable toward and away from each other, tools respectively rcarried by said tool mount members, and cam engaging f means respectively carried by ,said tool carriers and engaged with said cam means, wherebyrotation of said cam means imparts simultaneous reciprocation tosaid tool carriers in opposite dif rections.

5. In a finishing tool, a drive unit including, a housing and a rotatable drive shaft mounted therein, cam means on said drive shaft, a supporting member engaged with said housing, a

pair of opposed slideway guide means carried by said supporting member arranged transversely at therein, cam means on said drive shaft, a supporting member engaged with said housing, a pair of opposed slideway guide means carried by said supporting member arrangedA transversely at right angles to the axis of said drive shaft, one of said guide means being movabletoward and away from the other guide means, springk meansl arranged to exert pressure on said movable guide means toward said other guide means,

tool carriers respectively mounted forireciprocae tion in said guide means, and cam engaging means respectively carried by'said tool carriers and engaged with said cam means, whereby ro- Vtation ofsaid cam means imparts simultaneous reciprocation to said tool carriers in opposite di- `rections.y A 'i' Y l 7.1In a nishing tool, a drivevunit including .ai housing and a rotatable drive shaft mounted thereinja pair of oppositely eccentric axially spaced cams on said drive shaft, a supporting memberengagedwith said housing, a pair of op` posed slideway guide means carried byi said' supi ERNEST F. MooN. 

